Commit eb50439b authored by Will Deacon's avatar Will Deacon Committed by Russell King

ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP

It turns out that the logical CPU mapping is useful even when !CONFIG_SMP
for manipulation of devices like interrupt and power controllers when
running a UP kernel on a CPU other than 0. This can happen when kexecing
a UP image from an SMP kernel.

In the future, multi-cluster systems running AMP configurations will
require something similar for mapping cluster IDs, so it makes sense to
decouple this logic in preparation for this support.
Acked-by: default avatarYang Bai <hamo.by@gmail.com>
Acked-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Reported-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent a092f2b1
......@@ -41,6 +41,7 @@
#include <asm/irq.h>
#include <asm/exception.h>
#include <asm/smp_plat.h>
#include <asm/mach/irq.h>
#include <asm/hardware/gic.h>
......@@ -352,11 +353,7 @@ static void __init gic_dist_init(struct gic_chip_data *gic)
unsigned int gic_irqs = gic->gic_irqs;
struct irq_domain *domain = &gic->domain;
void __iomem *base = gic_data_dist_base(gic);
u32 cpu = 0;
#ifdef CONFIG_SMP
cpu = cpu_logical_map(smp_processor_id());
#endif
u32 cpu = cpu_logical_map(smp_processor_id());
cpumask = 1 << cpu;
cpumask |= cpumask << 8;
......
......@@ -70,12 +70,6 @@ extern void platform_secondary_init(unsigned int cpu);
*/
extern void platform_smp_prepare_cpus(unsigned int);
/*
* Logical CPU mapping.
*/
extern int __cpu_logical_map[NR_CPUS];
#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
/*
* Initial data for bringing up a secondary CPU.
*/
......
......@@ -43,4 +43,10 @@ static inline int cache_ops_need_broadcast(void)
}
#endif
/*
* Logical CPU mapping.
*/
extern int __cpu_logical_map[];
#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
#endif
......@@ -426,6 +426,20 @@ void cpu_init(void)
: "r14");
}
int __cpu_logical_map[NR_CPUS];
void __init smp_setup_processor_id(void)
{
int i;
u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;
cpu_logical_map(0) = cpu;
for (i = 1; i < NR_CPUS; ++i)
cpu_logical_map(i) = i == cpu ? 0 : i;
printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);
}
static void __init setup_processor(void)
{
struct proc_info_list *list;
......
......@@ -233,20 +233,6 @@ void __ref cpu_die(void)
}
#endif /* CONFIG_HOTPLUG_CPU */
int __cpu_logical_map[NR_CPUS];
void __init smp_setup_processor_id(void)
{
int i;
u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;
cpu_logical_map(0) = cpu;
for (i = 1; i < NR_CPUS; ++i)
cpu_logical_map(i) = i == cpu ? 0 : i;
printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);
}
/*
* Called by both boot and secondaries to move global data into
* per-processor storage.
......
......@@ -16,6 +16,7 @@
#include <linux/io.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <mach/regs-pmu.h>
......
......@@ -23,6 +23,7 @@
#include <asm/cacheflush.h>
#include <asm/hardware/gic.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <mach/hardware.h>
......
......@@ -25,6 +25,7 @@
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/timer-sp.h>
......@@ -72,9 +73,7 @@ static void __init highbank_map_io(void)
void highbank_set_cpu_jump(int cpu, void *jump_addr)
{
#ifdef CONFIG_SMP
cpu = cpu_logical_map(cpu);
#endif
writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
__cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
......
......@@ -15,6 +15,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/smp.h>
#include <asm/smp_plat.h>
#define SRC_SCR 0x000
#define SRC_GPR1 0x020
......@@ -24,10 +25,6 @@
static void __iomem *src_base;
#ifndef CONFIG_SMP
#define cpu_logical_map(cpu) 0
#endif
void imx_enable_cpu(int cpu, bool enable)
{
u32 mask, val;
......
......@@ -11,6 +11,7 @@
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
extern volatile int pen_release;
......
......@@ -20,6 +20,7 @@
#include <asm/cacheflush.h>
#include <asm/cputype.h>
#include <asm/mach-types.h>
#include <asm/smp_plat.h>
#include <mach/msm_iomap.h>
......
......@@ -13,6 +13,7 @@
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
extern volatile int pen_release;
......
......@@ -25,6 +25,7 @@
#include <linux/delay.h>
#include <mach/common.h>
#include <mach/r8a7779.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <asm/smp_twd.h>
#include <asm/hardware/gic.h>
......
......@@ -23,6 +23,7 @@
#include <linux/spinlock.h>
#include <linux/io.h>
#include <mach/common.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <asm/smp_twd.h>
#include <asm/hardware/gic.h>
......
......@@ -13,6 +13,7 @@
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
extern volatile int pen_release;
......
......@@ -19,6 +19,7 @@
#include <asm/cacheflush.h>
#include <asm/hardware/gic.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <mach/hardware.h>
#include <mach/setup.h>
......
......@@ -13,6 +13,7 @@
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/system.h>
extern volatile int pen_release;
......
......@@ -16,6 +16,7 @@
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/hardware/gic.h>
/*
......
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